Fuel injection system for an internal combustion engine
US6808124B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 26, 2002 |
| Grant date | Oct 26, 2004 |
| Priority date | — |
| Expiry date | Apr 15, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M63/0007
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The fuel injection system has one high-pressure fuel pump and one fuel injection valve for each cylinder of the engine. A pump work chamber can be made to communicate with a pressure chamber of the injection valve which has a valve member movable in an opening direction by the pressure in the pressure chamber, counter to a closing force. A first control valve, controls a communication of the work chamber with a relief chamber, and a second control valve, controls the pressure prevailing in a control pressure chamber urging the injection valve closed. In a first switching position of the first control valve the work chamber is made to communicate with the relief chamber, while the pressure chamber and the control pressure chamber are disconnected from the work chamber, and for a second switching position, the work chamber is disconnected from the relief chamber by the first control valve, while the pressure chamber and the control pressure chamber communicate with the work chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.